Finding the Fourth Proportional to 11,545.20, 15,931.50 and 7,559.39

Step by Step Solution

1. Step 1: Write the proportion equation
   11,545.20 : 15,931.50 = 7,559.39 : x
2. Step 2: Convert to fraction form
   11,545.20/15,931.50 = 7,559.39/x
3. Step 3: Cross multiply
   11,545.20x = 15,931.50 × 7,559.39
4. Step 4: Simplify right side
   11,545.20x = 120,432,433.27
5. Step 5: Solve for x
   x = 120,432,433.27/11,545.20
6. Step 6: Final answer
   x = 10,431.39